#pragma once

#include<iostream>
#include<string>
#include<strings.h>
#include<cstring>
#include<stdlib.h>
#include<unistd.h>
#include<sys/types.h>
#include<sys/wait.h>
#include<sys/socket.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<signal.h>
#include<pthread.h>
#include"log.hpp"
#include"ThreadPool.hpp"
#include"Task.hpp"
namespace server
{
    enum{
        USAGE_ERR = 1,
        SOCKET_ERR,
        BIND_ERR,
        LISTEN_ERR
    };

    static const uint16_t gport=8080;
    static const int gbacklog = 5;

    class TcpServer;

    class ThreadData
    {
    public:
        ThreadData(TcpServer *self,int sock):_self(self),_sock(sock)
        {}
    public:
        TcpServer *_self;
        int _sock;
    };

    class TcpServer
    {
    public:
        TcpServer(const uint16_t &port=gport):_listensock(-1),_port(port) 
        {}
        void initServer()
        {   
            //1.创建套接字
            _listensock=socket(AF_INET,SOCK_STREAM,0);
            if(_listensock < 0)
            {
                logMessage(FATAL,"create socket error");
                exit(SOCKET_ERR);
            }
            logMessage(NORMAL,"create socket success");

            //2.bind
            struct sockaddr_in local;
            memset(&local,0,sizeof(local));
            local.sin_family = AF_INET;
            local.sin_port = htons(_port);
            local.sin_addr.s_addr = INADDR_ANY;
            if(bind(_listensock,(struct sockaddr*)&local,sizeof(local)) < 0)
            {
                logMessage(FATAL,"bind socket error");
                exit(BIND_ERR);
            }
            logMessage(NORMAL,"bind socket success");

            //3.listen 设置socket为监听状态
            if(listen(_listensock,gbacklog) < 0)
            {
                logMessage(FATAL, "listen socket error");
                exit(LISTEN_ERR);
            }
            logMessage(NORMAL,"listen socket success");

        }
        void start()
        {
            // 4. 线程池初始化
            ThreadPool<Task>::getInstance()->run();
            logMessage(NORMAL, "Thread init success");
             //signal(SIGCHLD,SIG_IGN);
            for(;;)
            {
                //4.accept 获取连接
                //sock用来通信的fd
                struct sockaddr_in peer;
                socklen_t len=sizeof(peer);
                int sock = accept(_listensock,(struct sockaddr*)&peer,&len);
                if(sock < 0)
                {
                    logMessage(ERROR,"accept error ,next");
                    continue;
                }
                logMessage(NORMAL,"accept a new link success");
                std::cout<<"sock: "<<sock<<std::endl;

                //5.用sock进行通信，后续都是文件操作
                //version 1
                // serviceIO(sock);
                // close(sock);

                //version 2 多进程版
                // pid_t id=fork();
                // if(id == 0)//child
                // {
                //     close(_listensock);
                //     //if(fork() > 0) exit(0);
                //     serviceIO(sock);
                //     close(sock);
                //     exit(0);
                // }
                // close(sock);
                //father
                // pid_t ret = waitpid(id,nullptr,0);
                // if(ret>0)
                // {
                //     std::cout<<"wait success"<<ret<<std::endl;
                // }

                //version 3 多线程版
                // pthread_t pid;
                // ThreadData *td=new ThreadData(this,sock);
                // pthread_create(&pid,nullptr,threadRoutine,td);

                //version 4 线程池版
                ThreadPool<Task>::getInstance()->push(Task(sock, serviceIO));
            }
        }

        // static void *threadRoutine(void *args)
        // {
        //     pthread_detach(pthread_self()); 

        //     ThreadData *td=static_cast<ThreadData*>(args);

        //     td->_self->serviceIO(td->_sock);
        //     close(td->_sock);
        //     delete td;
        //     return nullptr;
        // }

        // void serviceIO(int sock)
        // {
           
        //     char buffer[1024];
        //     while(true)
        //     {
        //         ssize_t n=read(sock,buffer,sizeof(buffer)-1);
        //         if(n > 0)
        //         {
        //             buffer[n]=0;
        //             std::cout<<"recv message: "<<buffer<<std::endl;

        //             std::string outbuffer=buffer;
        //             outbuffer+="server[echo]";

        //             write(sock,outbuffer.c_str(),outbuffer.size());
        //         }
        //         else if(n==0)
        //         {
        //             //代表client退出
        //             logMessage(NORMAL,"client quit,me too");
        //             break;
        //         }
        //     }
        // }   
        ~TcpServer(){}
    private:
        int _listensock;//用来监听链接到来，获取新链接的
        uint16_t _port;
    };
}